main.lst

Hitex LPC2100 insider guide source code

ARM COMPILER V0.07,  main                                                                  07/07/04  10:12:49  PAGE 1   


ARM COMPILER V0.07, COMPILATION OF MODULE main
OBJECT MODULE PLACED IN main.OBJ
COMPILER INVOKED BY: C:\Keil\ARM\BIN\CA.exe main.c ARM DEBUG TABS(4) 

stmt  level    source

    1          /************************************************************/
    2          /* PROJECT NAME: AtoD                                       */
    3          /* Project:      LPC2100 Training course                    */
    4          /* Engineer:     T Martin   [e-mail]             */
    5          /* Filename:     main.c                                     */
    6          /* Language:     C                                          */
    7          /* Compiler:     Keil ARM   V1.3                            */
    8          /* Assembler:                                               */
    9          /*                                                          */
   10          /************************************************************/
   11          /* COPYRIGHT: Hitex UK Ltd      2004                        */
   12          /* LICENSE:   THIS VERSION CREATED FOR FREE DISTRIBUTION    */
   13          /************************************************************/
   14          /* Function:                                                */
   15          /*                                                          */
   16          /* Example Discrete Fourier Transform                       */
   17          /*                                                          */
   18          /* Demonstrates Fourier transform                           */
   19          /*                                                          */  
   20          /* Oscillator frequency 12.000 Mhz                          */
   21          /* Target board Keil MCB2100                                */
   22          /************************************************************/
   23          
   24          #include "lpc21xx.h"
   25          #include <math.h>
   26          unsigned val = 0;
   27          float XX[511];
   28          float REX[256];
   29          float IMX[256];
   30          float MAG[256];
   31          
   32          int main(void)
   33          {
   34   1       
   35   1      
   36   1      unsigned index,K,I,N;
   37   1      float PI =3.14159265;
   38   1      N = 512; 
   39   1      VPBDIV = 0x02;          //Set the Pclk to 30 Mhz
   40   1      IODIR1 = 0x00FF0000;    // P1.16..23 defined as Outputs  
   41   1      ADCR   = 0x00270601;    // Setup A/D: 10-bit AIN0 @ 3MHz 
   42   1      ADCR  |= 0x01000000;    // Start A/D Conversion 
   43   1      
   44   1      while(1)
   45   1      {
   46   2      
   47   2      /*for (index = 0;index<(N-1);index++)
   48   2      {         
   49   2      do
   50   2      {
   51   2          val = ADDR;                   // Read A/D Data Register 
   52   2      }        
   53   2      while ((val & 0x80000000) == 0);  //Wait for the conversion to complete
   54   2      XX[index] =(float) ((val >> 6) & 0x03FF);  //Extract the A/D result 
   55   2      }
   56   2        */
   57   2      XX[index] = 0;
   58   2      
   59   2      for (index = 1;index<(N-1);index++)
ARM COMPILER V0.07,  main                                                                  07/07/04  10:12:49  PAGE 2   

   60   2      {
   61   3      XX[index] = 0.5;
   62   3      }
   63   2      for (index = 0;index < 256;index++)
   64   2      {
   65   3      REX[index] = 0;
   66   3      IMX[index] = 0;
   67   3      }
   68   2      
   69   2      for( K = 0;K<256;K++)
   70   2      {
   71   3      for(I = 0;I<511;I++)
   72   3      {
   73   4      REX[K] = REX[K] + XX[I]* cos(2 * PI * K * I / N);
   74   4      IMX[K] = IMX[K] - XX[I]* sin(2 * PI * K * I / N);
   75   4      }
   76   3      }
   77   2      
   78   2      for (K = 0;K<(N/2);K++)
   79   2      {
   80   3      ;
   81   3      
   82   3      }
   83   2      
   84   2      }
   85   1      }

ARM COMPILATION COMPLETE.  0 WARNING(S),  0 ERROR(S)